Have you ever tried to purchase a product and realized your bill was a bit more than expected? Maybe it was a hidden “add-on” such as a case, warranty, or other form of “protection” that was automatically added, defended by the clause: in the consumers best interest. These types of user interfaces, especially on the web, are designed to descieve – as described by Harry Brignull at the UX Brighton Conference. Harry also runs a site called 90 Percent of Everything where he discusses all things UX and is self-described as “a site dedicated to understanding deceptive user interfaces, with the aim of stamping them out and improving the web for everyone.”
I highly recommend subscribing to his newsletter for any UX/design/dev/product heads out there.
Additional reading on deception and design: